Switch mechanism



Nov.'29, 1932. .,l. ERICKSON SWITCH MECHANISM Filed Sept. 29, 1930 6 Sheets-Sheet l Nov..29, 1932. J, ERlCKsON 1,889,240

SWITCH MECHANISM Filed Sept. 29, 1930 6 Sheets-Sheet 2 4 N 1 Inman Dr- Nov. 29, 1932. J. ERICKSON SWITCH MECHANISM Filed Sept. 29, 1930 6 Sheets-Sheet 3V Jul-m Erickson wmwm Rmw www

Nov. 29,V 1932. J. ERICKSON SWITCH MECHANISM Filed sept. 29.l leso 6 Sheets-Sheet 4 N O o m T 5 QDN Nov. 29, 1532.

J, ERICKSON SWITCH MECHANISM Filed Sept. 29. 1930 snegts-sheet 5 Y 6 Sheets-Sheet 6 Nov; Z9, 1932. J. ERICKSON swITcH MEGHANISM Filed Sept. 29. 1930 The present invention relates in general to switch" mechanisms, but isparticularly con- Fatented Nov. 29, '19.32'.

UNITED STATES` PATE-NT OFFICE JOHN ERICKSON, or CHICAGO, ILLINOIS, AssieNoii, ,BY MEsNE nssieivirnNrs, Tons- SOCIATELD ELECTRIC LABORATORIES, ING., QF CHICAGO, ILLINOIS, A COBPQRATlQN OF DELAWARE SWITCH MECHANISM Application flied september 29, i930. seria-1 No. 485,035.

cerned with the provision of a Compact switchmechanism vand of improved support.-

ing means for holding a large group of 1 such mechanisms.

.One object .of the invention is to provide i i, a switch mechanism which may be operated at much higher speed than has been possible to attain in former switch mechanisms of a similar character.

` Another obj ect is to provide a switch which is very compact, .but which may be readily disassembled for repair or inspection.

Still another `obj ect resides in the provision -ofla simplified mounting arrangement wherein the lsupport for the switches simply coni sists .of an 'I-beain upon both sides of which the switches may be readily mounted.

Another object is to provide a switch of Athe :foregoing type which may be readily modified `to operate spring combinations at desired level S-.or zcombiiiation'o levels of thewipers.

.There are various other detailed Lfeatures, not specifically mentioned, but which will be i brought `out in the description and claims which follow.

. The invention is disclosed in VsiXsheets of drawings which show various views of the switch mechanism as -well as the means by f which .the same `is supported.

1' illustrates an upright having one switch mounted thereon :with its cover in place, but with the switch banks omitted, and with .a second switch basein place havpart of its shaft which supports its wipers,

broken away. s

Fig. llis a view of. the jack assembly as it appears when withdrawn from the switch base as illustrated in Fig. 3.

Fig. '5 is a `:rear view of that portion of y Fig. 3 within `which the jack assembly is mounted.

6 is a sectional yview of av portion of thelbasetalcen on limite-6.0i? Fig. 1.

Figs. 7 and 7 B constitute a front view of the Vswitch mechanism with the portion designated Fig. 7C vremoved Vand shown immediately above its usual position in the assembl and with the portion Fig. 7D remove and shown immediately to the right of its position in the assembly.

Fig. 8 is a side view of Fig. 7D; while Fig. 9 .is a back view of this portion of the mechamsm.

igs. 1() and 10A, when placed together, illustrate a side view of the `mounting frame portion of the mechanism illustrated in Figs. 7 and 7B.

Fig. 11 is a detail ofthe mechanism Villustrating how the back stroke of theprimary magnet armature is adjusted. i

Fig. 12 is a view` of the right side of the switch mechanism with that portion of the frame member shown in 7B' broke-n away.

Fig. 13 is a rear view of the mechanism with that portion of the frame member shown in Fig. 7 B omitted.

Figs. 14, 15,116, and '17 are details of the level spring operating mechanism.

FigLlS is a top `view ofthe switch, with the frame portion shown in Figs. 10 ,and '10A4 omitted. f Fig; 19 is a side view, with the frame portion shown in Figs. 10 and 10A omitted.'

Fig. 2O 'is a bottom view, with the -frame4 portion shown in Figs. 10 and 10A omitted.

Figs. 21, 22, 23, and 211 are details of the shaft and 'its operating mechanismp Fig. 25 is a diagrammatic perspective il- I The vfront and back surfaces ofthe I beam are perforated and tapped to receive screws 301 to hold the switch bases thereon.

d it on thesupport.

e f ahmmrigsii, 4, and 5.

f af ribs 1o?, whichsre provided mere- ?stflymostmgthmtheafumre; on this p0r- ,.ismoun'ted, by, mesnsoffscrews 303 and 304 ff Q `bitei)erforatinsQ03 and 204. i'lhe WS04 limits the monument of the spring 3'.; ,':,`1iv`i.g;v fr g l; if ,Aim .of extensions lamd 106. andhavfr .rn .5 A the switch banks'. 'limi-fralnseslof.the'

@fred perfmasewhshsngn Cwith there; minmiltffand lyand f plsmfbyscrews, sae

- of insulngcombs 601 c .mat-mama .myst-mm pesfmefl` .u .1; and-604; rflbescrews pass' arethreaded into perfttlsn'p The assembly,

.y n wgonfjthe theropening.. Th nuts, such asr 351, arethen drawn-upto if :glie ismade up of y sont particu, melmdedrilledeand tapped,

, 6 sndof' a punched-out and formedsheet; mtgli v '011 asil1utrkdriniligs.7,.7,"l0,

l @nifl hef-The r portion-df the isfseeuredzto 'tlmeast thereof W'serews. j@ 'y i heetmetal portion of. therame has 4 Y yee.;

' its front portion, shown inFig. 7B,

c willfbeseen from 1, each base 'employs f in @ser feutre@ ""ai., Patent f v a f trical apparatus 'of the'` switc f As will .bevob- 113isi provided for lreceiving l 'j ldenof'tlra.ewwarmy-extendingl .the M309 iisprovided with 'aV hmhebaseaeswitefbekingspringBM -1u v.337". Y v, v

Y glhe/line wiper assembl as illustrated; in

. to theswitch sha et thefserews registering with f fsiltches in one side ofk the openi'afig,r andthe Y the` operation of the switch.

properly perforated to receive the varlous re condensers yre uired for use in the4 control of the switch. s illustrated, it is arran d to receive five relay assemblies and a con enser. The ressed-out portion, however, yclin be readi venlarged if more relay space is re- Referring particularlyv tol Fig. 13, it will be noted thata jack assembl 900 is bridged" VThis assembly is he d in place by suitable Allv elecbrackets 901and 902, respectively. Y is wired upto this'jack assembly. *l Y :Two vnotches 903 and the uppergportion125 ofthe switch fram and like notches-are also cut `out of theporV 4 tion 1526. of the frame. vThesenotches regisA ter withthe pins'501` to'504 of the .base when, rif

the lswitch is roperly mounted thereon with jack on ,the base'.V With` the switch in propel'` osition, the locking 1u 337 onthe switch rame snaps into av b .Ileckngthe switch in place against acciydental. removal. v To remove theswitch, it isne'cessary-to first withdraw spring 337 from Fig.l1,.comprises a brac t 610 which is made kofainsulatin material and held fav t 500 by the screw 351. The wiper. assembly itself comprises wiper ays and Y are'cutfonte!1 Y thsjmk of t e switch registering with the pier oration in the l viously-described loe ing spring 337, there-` parts 333::and 334 which are tensioned to-f wards' each other., To make the assembly more rlgid, a metal spacer 609 having-in-- sulationistrips-On each side thereof separates the vtwo V.wipers 333 and 334.

Theprivate wiper assemblyfis v 1n the same manner as the line wiperl bly, except that sincey there is1 lentypf room on the shaft, the holding brac eamo isn-f versedand no insulating members are; pro- `'When the switch iswired up,4the

cordsare extended between the wipers and' the wiper cord terminal block 910, shown in ,vided between the stiienmg member 609 and l: Y. .i

Figs. 7 yal1d20. The cords-are then threaaed v intotheislotconnected opening' 151 in the l framefmember soy that .they are lesslikely to become tangled up with the wipers rduring- Referring particularly to plained. j In order to transmit a horizontaler pi'lm'ary movement tothe shaft 500, the-same y y h Figs; 7 and 25 the shaft-operating mechanism will be ex-4 1s provided with a ratchet bar 610 held in place on the shaft 500 by nuts 375 and 376 threadedk onto portions of the vbar 610which a in Fig. `30, in the samemanner as are the y magnets 385 and 386 of Fig. 13. A primary magnet armature 540 is held in pivoted relaj tion'to the frame 15.0by a pin 501 passing' through the armature and the frame and held 11,31 `firmly in place by the key 537, visible in Fig.

18. VAdjusting screws like those shown in the top of the armature 545, of Fig. 13, are pron videdftoregulate the air gap between the magnet cores andfthe armatures. These screws lare held in'rany set position by a tension spring'such as 330. Aswill be observed from Figs. 7 and "20, the free end of armature 540 is connected with an `operating pawl 611 mounted` in'` 'pivoted relation to the arma- `ture and held in engagement with the associated ratchetbar 610 by spring 329 entending between the armature 540 and pawl 611. Inorder to procurethe 'proper backstroke adjustment of thearmatur'e S40-,the arrangement illustratedin Fig. 11 is employed.-

An armature backstopfadjustment cam 612 is slidably wedged vbetween the armature 5,40 andftheincline139` and is held. in its adjustedposition by a screwV passing through y ,the wedged member 612.and-inten` threaded v perforation in theframe 150.

` As illustrated in Fig.' 20, the armature 540 isnormally held against itsV back stop by tension spring 320. This spring is one of a 1X-@combination adjustably held between raised portions 152 ,and 1522 on frame 150.

, In ord-er todefinitely limit the forward `movement of the pawl 611, a pawl-stop spring 662 is provided. This spring is secured at its lowermost end to the frame 150 by means of screw 663. An adjusting screw 664,ipassing through the frame member 150,

is arranged tobe drawn up against the tension of spring 662 to accurately adjustthe extent of forward movement of pawl 611. A

reduced portionof the screw 664 registers with a small perforationl in the spring to hold the spring in'perfect alginment.

Pivoted to the lug 131 of theframe 150 is a holding pawl 613v (shown `in Figs. 7 and ).,.secured in place by a shaft or pin 504 which in turn is held in place by the key 530.

V This holding pawl lies intermediate to the ratchet 610 and pawl 611 and is held against l the surface of the ratchet teeth by a spring f 328 having its `left end connected to a portion of the holding pawl613 and its right end secured to apin on the upturned portion 5482 1 of a release magnet armature-548. fcc

4 Referreing now 'particularly to Fig. 12, it

Will'be observed that lying in the groovesof `lugsf130,136, and 1284, is a shaft 505 upon Y whichA isi mounted the assembly shown in Figs-.v 14 and 15,.whichwill be described later, ,and which includes -a shaft-:restoring arm of this movement, the holding pawl 613,

under tension of spring 328, will dro into the tooth to the left and hold the shaft moved to the right one step. l

Obviously, responsive to` any number up to ten impulses will cause the shaft 500 to be'movedto any of the intermediate or to the tenth position to the right against the ten sion of spring 327.

Mounted upon a raised portion of frame 150. and most clearly illustrated in Fig. 20, is a release magnet 615. The armature 548 of this magnet is connected in pivoted relation tothe frame 150 by means of pin 616 which is keyed to the frame by the key 530. The previously-mentioned extension 5482 of thisarmature, it will be observed from inspection of Fig. 7,'lies`adjacent to the holding pai-vl 613 vand at the upper side thereof. Therefore, upon energization of the release magnet, the armature extension 5482 rotates the` dog 613 clear of the ratchet teeth of the ratchet bar 610, and carries with it the operating pawl 611. When this occurs, the restoring spring327 draws the arm 614 to the left to restore the shaft 500 to its normal position.

`Other Aoperations which take placein the course of the primary operation and release of the switch will now be explained. Upon energization of the primary magnets `378 and 379 and the consequent operation of the armature 540, thetensionspring 320 encounters the bushing on Contact spring 322 and separates this contact spring from the contact spring 321. Obviously, therefore, upon each energization of the primaryrmagnets any circuit passing through the contact springs 321'and 322 will be momentarily in terrupted.

Likewise, Yreferring to Figs. 12 and 20, it will be observed thatassociated with restoring arm 614, there is a lever 617 pivoted to lugs on the frame 150 by means of the pin 507. The arm 619 on the lever 617 is engaged byan arm 614 of the lever 614 and is normally held toward the frame at this point so that the oppositely-disposed arm v618 nor- Vianen? permitting springs 206 andamio operate. 'f

f snide ofthe frame landin pivoted relation thereto, is @s a'leveirQB. An extelli 6 28gof this-lever,

inFig. liesjin the path ofmovement" of `arm 548 of thearmature 548, while ani 628th; the contact ..16 B11112092 'lmleaeewmagnet isactuatedhelever 628 if hor-mal position,

tions constituting theassemblilwhch .am

'smsuppoztlis securedin 'ffii m1641128?. r'Meuntekupon 619', v

- x we sets comprising'sprangs 301, Y mdi'nnelwfrwvely# y'se spring-'ninfa of, gear-.1 camsrand 626 are provided. The mi lslsecured inlfked'relationito aange eh eeveimgphygscrews 380ffp'assix i maedmtmdint thread" a. spacer 632`0n -Sj ftiie y ysideY f p .t m'bemaamw .entre itnppoaitato'tha onefpr 1S seurfdiegpmwn *tothe 5, halvigm um ind-aclockspring riveted tothe sec@ mounted' livetedfrelationy to pin 505 i wbchrpasees 622i otthesector; Y g `eembmati'in in ,provded with 'uiig-itsree' `p dwitharolle'r Y camita actuate Elja distaneedependent nume i* thegmagnets Les andinmefwtmthentad warmem-mgmffobvimlsly" .and which were 9 teduPOIl thezxmgmal movement'of Y stances do not l Aating mechanism just'described.'y Under que@ 1d by the seref'w'aes portioii ofe supe' Vthe ordinary operation' of the switch, follo'wwV `ra'tio'ns209 and threaded into openings'gm the of the magnets 385 and 8861i!! usual manner. AIntermediate:to the" with i y `Washer 636' vsimply serves a'sasspacenwlle yectang' member pro The armature'545 is piwotallysecured tofid rrframel() immediatelyiabove the my and 386 by a pin 501' held in place a 534. The amature 545 is prowdedwith atthe Sametime i an? pivotedtothe pin 505A i Gtheeteethgon sector; 622;,wi1l, rotate theA eyelet enthe' extreme end of the armatm' 378'and`379.- Furthermore, as will be ob served, the spacing member 632 having ten threaded perforations, enables the cams 625; and626 to be set at any desired position with y respect to the pinion 621 Aso that the spring' .m i gmbinatiois contrclled b' these cama may u voperate v at any esire ition, or'poq`4 if tions, of the shaft 500.. both nations are to be changed as a unit, the sector; if may be withdrawn clear of the pinion and the', t f pinion position readjusted with respect to l j" sector.y For example, if' the spring e tions. are setto 4operategin the seyenthf and* eighth positions'and itis desired to change them moprminthe are and tions, they sector is withdrawn clear o pinion and the pinionfrotated the ropr diei` tancein the proper direction an the Seem returned intov operative relation vtothe pingt 1on. Y f Circuit' arrangements vwith@ which f mechanisms of this typeare used inmany nt uire the level 'springfopel'e circumstances theassembl ispomitted and I" '1| short pnsimilar to 505, ut0nly reaclsig i. framing 1284 to lug 13e need-be e lo With this arrangement, thetensono plig B21-alone is-ample to hld the arm 614 the shorterpin in placezon the assembly.;y The operations. which normallyoccursuby sequent to the horizontal or primary of the shaft-500 will new be gone ing the primary movementof the shaft, gm duced tobi-inv the Awipersets opposite a der" six-ed groupe bank contacts, the shaft is tated from Vone to eleven steps dependi i upon the number of impulsesptra either directively or automatically, by the m rotary ma ets 385 and- 386. These magnets; aresecu to a shelfin the frame 150 by' I screws '635 and 636 passing thronghc'perfos 150, and the cores of the liia'grietsV 385 and" 386v aredo ble-hole washersf, @1116832 635 is' of magnetic .materiai 'and' servesas a ni magnetic yoke between the twomagnet cmu 545. Near 'thevfree endiof the armature f5 a pin alsoY is provided; Adjacent this Aand passing through the upper part of the frame 150 is an adjusting screw 302 which cooperates with the pin 09 to determine the back stroke ofthe armature'545. On the opposite side of thepin 509 isV a tension spring 303. properly tensioned to hold the armature against its baclrstop. The tensioned spring 303 (and contactsprings 304 and 305 are mounted on `a bracket642 adjustably held .between raised portions 142 and 1422 of the .frame 150. Obviously, whenever the magnets 385 and386 are energized, the armature 545 6 is drawntoward the magnet pole pieces with fthe results that `pin 509 actuates against the `tension of spring 303 and through the medium of the bushing on spring 305 interrupts the contacts of springs `304 and 305 during `the period of energization-of the magnets The forward `movement of the rotary pawl 637 is accurately determined by a slidable pawl stopr667 slidable in the groove 146l and VAheld in'any' desired'position by the holding screw 668, as shown in Figs. 7, 12, and 27.

- From observationv of Figs. 7, 12, and 25,

cleared, the circular portion 680 onplate A700 Y isprovided. Upon the first rotary step of thel shaft 500, a toothof the rack rides onto the rotary portion680` andupon the second step it clears thepawls 611 and .613. Obviously, therefore, the pawl G11-merely functions to prevent retrograde movement of the shaft 500 prior to the transmission .of rotaryV motion to the shaft.

VThe pawl 637 Vtransmits rotary motion to `the shaft 500 through the medium of the ratchet wheel 640, specific details of which are illustrated inFigs. 21 to 23, inclusive.

` :The ratchetwheel 640 Vlits over the shaft 500 and is keyed thereto by the rack 610 passing through a notched-out portion 643 of the ratchet wheel.y A knurled member 645 has anotched-out portion v650v passing through f i a portion of the `frame member 150 and is secured in fixed relation thereto bythe nut Y. 1 rotatedto tensionthe spring 350 to any degree desired or foundfnecessary to restore the shaft Y to its normal position, with respect to its ro tary position after having beenmoved around to any of its rotary ott-normal positions,

and the lock nut 383 Vagain tightened up. Mounted on a pin 536 in the upper forward part of the mechanism, having reference to Figs. 7 and 12, is a holding pawl 655 having its free end tensioned against the teeth vof ratchet wheel 640 by the associated spring" 326, which extends between pawl 655 and pin 701 on plate 700. This pawl has a for- Wardly-extending member 655 the purpose of which will be explained later.

Alsomounted upon the pin 536 is a comb l member 653 having an upwardly-extending spring-operating pin 647. The rotary off-normal andeleventh Contact cam spring combination illustrated in Fig.

7C, when in place in the upward-forward portion of the frame member 150, is-` placed under control of the spring-operating member 647. As will be seen from Fig. 18,

the finger 652 ofthe spring-holding bracket extends down between springs 315 and 316. l

The springs 316 `to 319, inclusive, are rotary o-normal springs, while the springs 309 to 315, inclusive, are operable upon the eleventh rotary step.

Referring now to Figs. 7l and 21, it will be observed that a lever 657 is secured to the underside of comb 653 bythescrews 384. This lever is normally acted'upon by the tension ofspring 350 in the ratchet' wheel. 6'

The cam 568 on. wheel640 normally holds the spring-operating member 647 against the spring 316 withsuiiicient force to overcome its tension and, therefore, holds the spring 'I combination in the position shown in Fig. 18. Upon the first rotary movement of the shaft '500, cam 568 is carried away from lever 657 and, consequently, the springy 316 functions to move its spring combination. Since, however, the finger 652 extendsdown between springs 315 andf316. none of the springs 309 to 315 yare affected bv the` vmovement of springs'316 to 319. This -is further guarded asainstby the semi-circular portion of lever 657, beine' brought near theinner surface of the. cam 568 which positively limits the nossible distan ce of rotation of spring-controlled member 647.

`When the shaft has'been rotated ten steps, the lower end of lever 657 clears the eXtreme right edge of cam 568 rendering the springoperating lever 647 free to be operated a greater' distance than heretofore. When the shaft is rotated the eleventh step, pin 660 on the rack 610 encounters oneof the teeth on comb 653 and in so doing rotates the comb ai suiiicient distance to cause the spring-operating member 647 to operate the spring combination comprising springs 309 to 315, inclusive. t Y

When certain groups of contacts are selected it' may be desirable to prevent the opera- Vtion of the cam springs.v In such instances it is only necessary to break ofi' the'proper Y 'ofb "g abofit'the fest@- el shaft 500v consequent to the opera- 'lherelease ma t, following the 1onmovement o the'shaftyhas heretobeen YReferring now partic- Z,7D;8,9, and 12,themanner w 500m release to its norlxinlfihidinalfand rotary te nini* mas usta in 'Y f" 710 slidably secured 'ji'. l'ta (Qby melns'zoirivets-WOS. two openings 706 and Iztvth the! y .4 of therotglfy fthroug'h open- Erilimfwhiltlefexnsion 548' of urs-en weer through of the extension 548' the Alink i i the f fhd.. f" lSplill v @mi A fuhefha'ld o ftlreteeth onthe rack 610 b ernsioniswtamamm-is, the sha 40 move @"itsnqrmalposition, f switch ythe contact Y 208 *magnwv am ist ostthe magnet has a locking Y 549 which Vwith, alocking 'MWL Whentheswitch shaft-isstepped l thearmBOQ actuates thcoffmor- "H1" combination inthe Vsaune manner done bylsrm 617 Vin .the formenarrangemagnet gcombin'n'tiondoesnot'nctuate 'ff' e am ure alsof tlieiw f et' asses' i i V r The moving rrstagimim of' sie Hanns Ito its'A normal rotaryA` nitY 680 oflplate'700, @fand d ogliiareat this s i u f yamwmfae am i. twithlthe mgthli manner, are usually arranged to insure I zuammesimahaam soainaadi timmves'clesrofsprng amgbuc chemists@ 'i'.ssaseo Y ment of spring 801. When thefrelease net is operated andthe armature 549 thereof attracted, the locking arm 549 is brought in .Y

with theo ning803 in-spring'y 803 l ...i and, accordingly, e spring 801 moves to-s ward the frame andxpermits the spring combination to operate. VThe release magnet may be deenergi'zed immediately L the armature 549 is'now held in its F position by the sring Vv801. thes affini- TJ sumas its'no'rma position, kthe arm 802119; 5 f f stores the o-normalsprings to normal tion and'fat the sametime'moves thespririg 801 clean of arm 549', thereby permitting th armature 549to restore to its normal :'Wlat'is claimld isz 11;. l." n 'a' switc anism, a s', fromm-a yshaft havingbearings inV fraaie; i means for transmitting endwise movementtof 4" [saidsliaft, sets ofy 'contact print; lr cams for operating m,' an means operative consequent the endw movement ofsad shaft 'in rotate' said and thereby operate said v sprmgs'. l ,Q Suf' 2. 'Ina multi-position switch,v setsof bank im "contacts, wiper sets havin access to said contact sets, a plurality'o y contact sp combinations, means' for: actua r.-

combin tions atsel'ected settnlgsf'lf: 'said iiper sets, and means f or 'chan .settngof one or 'any number of fsai means to opera-te at othe esi of said wiper'sets at will. Y J 3. aswitchmechanism wherein a shaft' i is operated in a prima directionand thea in a ,secondary direction to position wipers into electrical connection with a specifled yset Vof bank contacts, a contact apri iaai semblyfoomprising a bracket having se "of conmspringsind having sprin operating-" camsthereon, and means Yfor read ysecr Sadgssembly in operative relation toA l Y- V'switch tolenable theswitch tooperate L conta.ct. spring sets incidental to movements of the switchwi ers. 1 g 4. In a-switch structure aving a. multiposition rotatableY shaft, a :contact c ombination, jfor cperating certain t e rmgsf "so -f'sai vcom mation www to votation of 'said shaft4 af-limited s fill vtance'ariclf other' means oierative to frtlxer rotation of sai shaft kto cause first means toalso move other springsjof said combination'. y if! i 5.1 fifa. switch structure vhaving a multi 13'* positionV rotatable shaft, Y a contact sp" l combination, means foro rating certain o the springs of said comblnation consequent--r Y totherotaton of said shaft a limited` wtli` I tance, and other'means operativeconsequent-Vn to a. ic distance of further saids aft to cause said first-means move other springs of said combination in N'S certain instances.'VK

6. In a lswitch me consequent jjf1 chanism, a

armature pivoted to saidframe, a pin on said #armature for Voperating associated contact springs alsomounted on the frame, and an adjustingscrew passing through a portionv lportions for receiving the heads of the screws and the side thereof having notched-out portions for receiving the Vfreeends of the screws, 4and nutsthreaded on said screws and drawn lagainst said jack receiving means to frictionally hold said jack assembly in place.

8. f In a'switch mechanism, a frame, a shaft on. said frame, Vmeans Y for operating said shaft, anda. spring and cooperating arm for restoring saidshaft,` said Aspring and arm pivotally secured tosaid frame by the tension ofthe sprinv.

9. In a switch mechanism,a frame, ashaft protruding Y through `onefwall of said `frame,

a. set-of Wipers onfsaid shaft on one side of the wall, a terminal block on saidl fram-e located on thev other side ofthewa-ll, said wall having an opening `therein thaving a restricted portion `extending through the ex- `treme edge of the wall toenable wiper cords to be threaded into `orout of said opening after the -cordshaveV been secured to the `wipers and block respectively.

10. In aswitch structure, a switch base comprising a bach portion' 'anda switch bank fholding portion arranged parallel to each other and with a connecting portion lying at right angles to said parallelpcrtions, a switch mechanism assembly slidable into said base,

and means for automatically locking the switch mechanism and base together consequentto the placing'of said mechanism in a redetermined position with respect to said aser y 11. Ina switch and base assembly, a jack .and a setof contact banks on the baseupon which incoming connections mayV be termi-V nated,`a jackand wiper set on the switch upon which outgoing connections may beterminated, means for removably holding said switch and base into juxtaposition to each other with the jacks of the switch in register to each other;

with "each otherand the wiper sets in operative relation to thecontact banks, and means y for automatically locking the switch and base together consequent to the `placing of said switch and base in such position with respect I 12. In combination, a vertical member,

`switch.bases mounted one above another on A" either or both of two sides of said member, Switch "contactbanhs and Via'cli assemblies on said bases", switch mechanisms removably V'mounted on said'bases and having wipers ,col

operating with the contacts of said contact banks and jacks registering with the jacks on said bases. t

13. In an electromagnetically operable switch of the type having a shaft adapted to be driven by a pawl and ratchet mechanism in a primary direction by one magnet and then in a secondary direction by a second pawl and ratchet mechanism and a second magnet, a movable pawl for holding said first ratchet in any position to which it is operated in its primary movement, means operative consequent to the secondary movement of the shaft for moving the first ratchet clear of said movable pawl, a fixed member for holding the rst ratchet and encountered by said ratchet consequent to the secondary movement of the shaft, a second movable pawl for holding the second ratchet in any-position to which it hasbeen advanced, and means including a link-connection between said movable pawls for permitting the shaft to restore to its initial position.

14. In an electromechanical switch having a shaft, pawl and ratchet mechanisms for moving' said shaft in a step-by-step manner endwise and then rotating it in like manner, independently movable pawls for vpreventing retrograde movement of the shaft, a fined element for preventing endwise movement of the shaft while the shaft is in a rotary oftnornial position, a release magnet having a release armature coacting with said pawl and ratchet mechanisms, when said armature isheld in its operated position, to clear the pawls of said mechanism from their ratchets; means then operative to restore the shaft to its non-rotated position clear of said fixed element, and means for then restoring said sha t to its initial endwise position. Y 15. In a switch mechanism, a shaft, means 4for moving said shaft iii a primary direction, sets of contact springs, means operative consequent to the movement of said shaft for operating one set of said springs andfor preparing the other set for operation, an element operative to bring aboutV the operation of the prepared spring set and the restoration of said shaft, means for locking said element in its operated position until the shaft has substantially fully restored, Ysaid shaft being operative during the final portion of its restoring movement to cause the first-mem tioned means to restore the said element and both spring sets.

16. In a switch mechanism, a shaft, means for moving said shaft in a step-by-step manner in a primary and then in a secondary direction, sets of Contact springs, means for actuating one set consequent to the Ainitial primary movement of saidshaft, means for operating afsecond set each time the shaft is mov-ed in the primary direction, means for operating a third set consequent to a predetermined primary movement of said shaft,

TID

gudfwithfitthe operating `WW Y f Y j y Y '1,889,240

lmeans for operating a fourth set consequent tothe initialsecondary movement of said shaft, means ,for operatinga fifth set each Vthe shaft isy moved in a secondar direcs- I tion, and means foroperating a sixtvsetof f said contact springs consefaent .to Asaid shaft 'be' -operated ina secon ry direction be.-

V y0Y i. predetermined distance.

li. In a switehmecha'nism, a shaft,pawl

f mand vratchet mechanismsY for moving said shaft' in`r aprimary and rsecondary direction respectively, independently movable /pawls for.; holding said. shaft against retrograde f movement, springs 'for restoring said shaft to 'u itsinitial position, and lan element for holdrins eid saldsha Y to enable said Asprings to function.

asritchfmechanism,-zashaft,a rack A wls. outofropcrative-relation with ratchet f wheel respectveiy Y secured to i slifpshaft, anffoperatlngfpiwl Vassociated,

" v o'irating pawl associated hetwf `rato holding pawls between the lrackandfratchet wheeland their operatingrpawls, enemeans for moving' ghe or #the'ra l imdotluar.A means operative by said Y one meansfto also oieaivtheV other holding and operating Lpawl clear of the-ratchet wheel.

y 19.1na switch mechanism, a shaft, a rack .3 anypnsition to which it is moved by erating pawl, a vfor ho k3Q in lfixedfrelation to said shaft, a

. ratchet wheelkeyod to said shaft with the I. shaft sldable thereon, an `operating pawl for operatngsaidsliaft thronghzthe medium of its a pawl forholdin'gsaid' shaft in said op dingsaid n rack, a .secondY pawl A cooperative withsaid ratchet `wheelto rotate said lshaft and to rotate said rack into cooperative relaffw, aan with Sadaxsdimember asa-the mk 1 ofi its lopcratingfandholding'pawls,

`moans 'for restoring said shat'to its initial .e andmcans for holding said'operat- `ingahd holding pawls clear of the rack and froment i 45. ratchet wheel while the; shaft is restoring.

20. In -a'switch mechanism, a supporting air of.- magnets moxmtedffup'on a shelf portion of saidY frame, an. amature for saidmagnets having-asnpporting shaft passs n ing through other .pqrtlons of said4 frame 'anda key passingthrongh the amature shaft and-*secured to aadiframe tohold the shaft in@ L.fixed'relation to but readily removable said'framc. 1;" e

` e :55r `121. insg-witch mananismaframe, shaft .haring 1a ratchetwheclithereon, a pawl for y ,operatirtgjsaid ahafttlrroughthe'medium of saidratchet wheel, aoircuitswitching spring` v combination, a second shaft'rrying a holdf-g pawl `Vcooperativo witlr'fsa'id ratchet to plnventictrgrlafmovcmentthereof, an ee- Y i mallyipreventingzmin rsprings .of rsaid combination from g'under their own f amish, ...am mfmsysaiaigand 'shaft ytherein of a greater diameter than is tlmL 1, i

kcndnrise andthen in a rotarydireetion to'seg .g .lectirely' position its.wipe1's,v` the coxnlm atlelf Y rotatedby the second -Y Y equippediwith contact wipersl is first ritrovatiL ing it' during kthe "endwise movement of enabling the actuation, under their own I sion, ofthe springs of one of said groups cooperative with a cam onsaid ratchet what! to hold the element in itsnormal position une' til the; rst shaft has *been i operated. other means carried bysaid shafts coopera tive with each other to vcause said elementfto .1 actuate the remaining springs of the combie nation during va subsequent movement of. they i first shaft. e

. 22. In a 'wiper assembly, a wiper hol bracket made of insulating material andhlf2,?.s ing a hole therein for receivin a shaft, met# for frictionallyy holding said racketto shaft, and awwiper'assembly havingfsiy lolary in the bracket, the holeiin said Wi i bly beingtinl register and contanti-grim l' hole in saidibacket. K f 23. :In a switch mechanism whercinalshlwrequipped with contact wipers ils'v rst' mond:

of y*aanassociated'.shaift, with means` fol"y tatng'it during the endwise Vmovementsof- Y. thoirst shaft, and groups ofcontact spriixga` vari bl,V operated in accordance with the and# 9 wine `ymovement'. of .the rst shaftlby A 'L'j' 24. aswiteh mechanism wherein ashalt-vn end wise andl thenin a muy imotiontosyw lectlvely POSOH its wipers, the combinatii 5 of "n associltedshtf with means for' first shaft, a plurality offspring sets each his. f`* 5 ""2 ing an operating cam, andk means for changing the position of any cam with j f to the second shaft to cause the operation-dol, itsspring sets to occur at a different endvisc i position of the iirst shaft. f 25. I n a switch mechanism, a spring asscm- 'm bly comprising va bracket upon which "the springsl are mounted and having a 'separating the assembled springs into` two groups, a shaft for the switch with nism for rotatingthe shaft, a leveractuld Y g by the initial rotary movement of said shaft a distance limited by said finger, and 0th* ,l l meansassociated with said shaft co-operatng withsaidlever to actuate the said V,springe4 f ofthe other group uponv a subsequentrow tion'of said shaft. f Y.. n Iny an electro-magnetic switch whe'ie .a shaft is firstfmoved endwise a limited nudi. n

vbe'rcf steps by Smoby-Step mechnsm'm said shaft to move the comb upon rotation of the` shaft its limited distance, those teeth of the comb which are individual to specified endwise positions of the shaft at which the springs should not be operated being broken away.

In witness whereof, I hereunto subscribe my name this 26th day of September, A. D(

JOHN ERICKSON.

i 1930. Y m 

